During puberty, there are many changes in the human body due to the glands that release chemical signals called hormones. Which system is most responsible for controlling these changes

The brain and spinal cord are made of nerves. They are part of the

The brain of the cell

The reason your heart beats faster is the brain received a message from your muscles to

The nervous system tells the stomach muscles to contract quickly so germs can be removed from the body

An example of external stimuli

A RESPONSE to this external stimulus: the hot sun

regulates organs by secreting hormones from glands

coordinates and controls all of the body’s activities

to maintain stable internal conditions (by vomiting, fever, etc.)

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